Compilare: user.cpp: In function ‘int main()’: user.cpp:21: warning: format ‘%ld’ expects type ‘long int*’, but argument 2 has type ‘int*’ user.cpp:21: warning: format ‘%ld’ expects type ‘long int*’, but argument 3 has type ‘int*’ user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp:54: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp:56: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp:56: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘int’ user.cpp:56: warning: format ‘%ld’ expects type ‘long int’, but argument 4 has type ‘int’ user.cpp:19: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:20: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result /tmp/ccJWSXOC.o: In function `main': user.cpp:(.text+0x9c): warning: the `gets' function is dangerous and should not be used.